When a user/member subscribes to a forum in a group, they get a notification whenever there's a new post. 

The in-app notification includes the forum name, a link from which the post originated, and some handy links at the bottom to navigate to the thread or to reply.  

The corresponding email notification enables you to respond, but does not include any information about the forum from which the notification originated.  If you don't recognize or know the person posting, you may have no idea why you are receiving an email from another user with a question/post. 

The email notification should include the forum name, just like the in app notificaiton.